31422291913 has 2 divisors, whose sum is σ = 31422291914. Its totient is φ = 31422291912.

The previous prime is 31422291821. The next prime is 31422291919. The reversal of 31422291913 is 31919222413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28424948409 + 2997343504 = 168597^2 + 54748^2 .

It is a cyclic number.

It is not a de Polignac number, because 31422291913 - 2⁹ = 31422291401 is a prime.

It is not a weakly prime, because it can be changed into another prime (31422291919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711145956 + 15711145957.

It is an arithmetic number, because the mean of its divisors is an integer number (15711145957).

Almost surely, 2^31422291913 is an apocalyptic number.

It is an amenable number.

31422291913 is a deficient number, since it is larger than the sum of its proper divisors (1).

31422291913 is an equidigital number, since it uses as much as digits as its factorization.

31422291913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The spelling of 31422291913 in words is "thirty-one billion, four hundred twenty-two million, two hundred ninety-one thousand, nine hundred thirteen".